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Stock MarketSecuritiesForeign InvestorsInstitutional InvestorsCorporate GovernanceStock PriceAnnouncement EffectIndividual InvestorsKorean MarketShort SellingInformation AsymmetryPension FundsAnnouncement EffectsStock ReturnRetirement PensionAsset AllocationShare RepurchasesCumulative Abnormal ReturnStatistically SignificantMarket Reactions